Allow setting input and output

[ruyadorno]

Resurrecting the ideas from #188 #197

I just stumbled upon a use case where having the ttys module support that @naholyr added would have saved the day (basically reading from stdin and prompting user with info taken from there).

By reading through the history of these PRs it seems to me that ttys turned out to be a very unreliable module that unfortunately only worked on some terminals and eventually all the changes got reverted 😞

@SBoudrias would you be open to implement back the possibility of setting input/output but defaulting to process.stdin/process.stdout instead? That would at least allow use cases like the one I have to deal with now, to opt-in for ttys or to use some other better solution in the future.

[SBoudrias]

Yes, I totally want to allow a user to set input/output stream manually.

It just requires a bit of a refactor.

[ruyadorno]

would it be the same refactor from #197 ? (excluding adding ttys again of course)

[SBoudrias]

Similar to it yes, but I'm pretty sure there's place where we're calling process.stdout directly. I remove them as I fall on them, but there might be some still around.

[ruyadorno]

got it, I might give it a try and send a PR in the next few days 😊 thanks!

[naholyr]

Well done :)